PlantFun
Plant Needs
Sunlight
Requires full sun exposure; tolerant of coastal salt spray and strong winds, making it suitable for coastal landscapes
Watering
Drought-tolerant once established; water young trees regularly during dry periods to support root development
Temperature
Hardy to -10°C; adapts to cool coastal fog and moderate summer heat, but may struggle in extreme inland heat
Characteristics
- Leaf: Dark green needles, 2 per fascicle, 8–15 cm long, stiff and sharply pointed
- Cone: Ovoid, 7–15 cm long, armed with sharp spines; serotinous, opening after wildfire
- Bark: Thick, furrowed, dark brown to gray-black, providing fire resistance
Care Guide
Watering
Water young trees 1–2 times weekly; established trees only need supplemental water during prolonged drought
Fertilization
Apply a balanced slow-release fertilizer once in early spring to support new growth. Avoid high-nitrogen fertilizers, which can promote weak, susceptible growth
Eggshell powder topdressing：Crush dried eggshells into a fine powder; sprinkle lightly around the base of young trees, avoiding direct contact with foliage to prevent burningPruning
- Remove dead, damaged, or diseased branches in late winter to improve airflow and reduce fire risk
- Thin overcrowded branches to maintain an open, balanced crown and promote healthy growth
- Avoid heavy pruning, as pines do not regrow foliage from old wood
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; ingestion of needles or sap may cause vomiting, diarrhea, lethargy, and abdominal pain
Humans: Ingestion of large quantities of needles or resin may cause mild gastrointestinal upset, including nausea and cramping
Garden Uses & Culture
Culture: Symbolizes coastal resilience and fire adaptation in western North American ecosystems
Usage: Ornamental tree for coastal landscapes; source of timber for construction and pulp production
